John j



(No Model.)

J. J. HOLLAND.'

BOLT.

No. 389704. Patented sept. 18, 1888.

WITNESSES:

Lmwgnpher, wml

` UNITED STATES PATENT OFFICE.

JOHN Jr. HOLLAND, OF NEW ORLEANS, LOUISIANA.

BOLT.

SPECIFICATION forming part of Letters Patent No. 389.704, datedSeptember 18, 1888.

Application filed May 23, 1888. `Serial No. 274,814. (No model.) Y

To all whom, it may concern.-

Beit known that I, JOHN J. HOLLAND, of New Orleans, in the parish ofOrleans and State of Louisiana, have invented a new and ImprovedLock-Bolt, of which the following is a full, clear, and exactdescription.

My invention relates to a lock-bolt adapted more particularly forlocking or fastening outside blinds of windows against intruders, butapplicable for fastening doors or other structures; and the inventionhas for its object to provide a simple, inexpensive, and efficientdevice of this character.

The invention consists in certain novel features of construction andcombinations of parts of the lock-bolt, all as hereinafter described andclaimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is an inner face view of the lower outer corners of a pair ofordinary Venetian blinds with my improved lockbolt applied thereto, theblinds being locked closed. Fig. 2 is a sectional plan view taken on theline x :r in Fig. 1, and with the key applied, as when locking orunlocking the bolt, the bolt being shown locked; and Fig. 3 is avertical transverse section taken on the lineyy in Fig. 2, but with theAbolt unlocked.

.The bolt-bar A is preferably fitted to slide in keepers b b, fixed to abase-plate, B, which is to be fixed by screws or otherwise to the innerface of one of the window-blinds,0, and so that the outer end of the barmay be shot into a catch or keeper, d, fixed, preferably,to a baseplate,D,which is fastened by screws orotherwise to the other windowb1ind, E,of the pair of blinds, which are shown only in part, but which may behung at their outer edges lin any approved way to thewindowframe stiles.The bolt-bar is provided with a thumb piece or plate, a, which ispreferably made with ascrewthreaded stem adapted to a tapped hole in thebar, as shown in Fig. 2, which is a cheap construction, and preferablyover a thumb-piece secured to the bar by riveting a stem of it at theback face of the bar.

The bolt-bar A is provided with a hole, F, which is adapted to receivethe bit g of a key,

G, and when the bolt is projected this hole F coincides or registerswith the outer end of a screw, H, which is threaded into a nut, I, whichis preferably formed by tapping out a lug cast upon the inner or backface of the bolt-bar plate B; but, if preferred, the nut may be formedseparately from the plate, and may be attached thereto in any approvedway, allowing the screw H to be turned out into the bolt-bar hole F orturned inward clear of said hole and the bar. Figs. 2 and 3 of thedrawings show that the screw H is provided near its outer end with acollar, h, which is larger than the extremity of the body of the screwwhich fits the bolt-bar hole F and is about the same diameter as theouter faces or periphery of the threads of the screw. A shoulder is thusprovided at the outer face of the collar h, which is adapted to strikethe inner face of the bolt-bar A, while the outer end or head of thescrew enters the hole F in said bar. The outer part of the bore of thenut I, or that part of the bore passing through the plate B, is devoidof threads, to allow the locking-screw collar h to pass within the nutas it is turned back far enough to allow its outer end to stand flushwith or a little back of the outer face of the plate B. Y

At its outer end the locking-screw H ma be provided with aV wald of anyapproved form. The ward shown is a simple transverse central tongue, h,and the key G shown has a notch in its bit g, which tits over the wardand allows the screw to be turned by the key. I purpose, however, toprovide differentlyshaped wards on the outer ends of the screws H of aseries of the locking-bolts while tting any of the screws to all thenuts I of the bolts, and thus, while every screw H can be turned oroperated only by its own key, the screws of the series of bolts may bereadily interchanged by removing the thumb-pieces a ofthe boltbars andthen slipping the bars out of their keepers b on the plate B to giveaccess to the screws. This interchangeability of the locking-screws is avery desirable feature, as it increases the chances of complete safetyby preventing easy tampering with the bolt-screw on the blinds of anyparticular window more exposed than others to be opened from the outsideby intruders. Next its bit g the key G is IOO provided with a shoulderor shonldershq, which limit theinward movement ofthe key when the screwHshall have been turned far enough into the nut I to cause the screw toclear the bolt-bar A, and the outward movement of the screw by the keyis limited by contact of the screwshoulder h with the back of the bar,at which time the screw enters the bar sufficiently' to lock it againstendwise movement, while leaving the end or" the screw concealed orcovered by the plate in a manner making the operation of the screw quiteimpossible from thc outside of the window and difficult from inside theblinds without the key.

It is obvious, when the blinds are closed and the bolt-bar A is shotinto the keepers I) of the plate B, that the key G may then be insertedin the hole F of bar A to turn the screw H out into the bar for securelylocking it, or for turning the screw back for unlocking it to allow thebolt-bar to be withdrawn when the blinds are next to be opened. Y

In so far as the principle of operation ofthis locking-bolt isconcerned, the nut I may be formed on the keeperiplate D, andthe screw Hfitting the nut would then enter a hole, F, at the other end of thebolt-bar A; hence either plate BD may be considered the base-platewithinthe scope of the claims hereinafter set forth. Furthermore, the plate orplates B D may be dispensed with, provided the keepers b d be fitted tothe blinds, and in this case the nut I, hold' ing the screw H, would befixed directly in or to the rail or stile of the blind, and any suitableinstrument or device may be used for turning the screw to lock or unlockthe boltbar, as will readily be understood.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patentl. The combination, in a lock-bolt, of a.sliding bar having a hole passing through it, a nnt fitted to the blindor other object to be fastened, and a screw fitted to the nut andoperative through the bar-hole from outside the bar when said bar isprojected, substantially as herein set forth.

2. The combination, in a lock-bolt, of a sliding bar provided with ahole, a nut fitted to the blind or other object to be fastened, a screwfitted to the nut, and a key adapted to the hole in the bar to operatethe screw for locking and unlocking the bar when it is projected,substantially as herein set forth.

3. The combination, in a lock-bolt, ofa baseplate, a nut formed integraltherewith, a sliding bar on said plate provided with a hole, and a screwfitted to the nut and adapted to enter the hole in the bar for lockingit when projected, substantially as herein set forth.

4. The combination, in a lock-bolt, of a sliding bar provided with ahole, a nut fitted to the blind or other object to be fastened,and ascrew fitted to the nut and adapted to the bar-hole, and provided with acollar or stopshoulder limiting the outward movement of the screw in thesliding bar, substantially as herein set forth.

JOHN J. HOLLAND.

iVitnesses:

JOHN W. LEHMAN, l. A. RINZ.

